Classification
000 - Computer science, information & general works
333 - Economics of land & energy
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
24
330 - Economics
17
363 - Other social problems & services
16
320 - Political science
14
600 - Technology
12
900 - History & geography
12
620 - Engineering & allied operations
11
551 - Geology, hydrology & meteorology
7
576 - Genetics & evolution
7
720 - Architecture
6
610 - Medicine & health
5
500 - Natural sciences & mathematics
4
140 - Specific philosophical schools
3
800 - Literature & rhetoric
3
304 - Factors affecting social behavior
2
370 - Education
2
414 - Phonology & phonetics
2
530 - Physics
2
580 - Plants (Botany)
2
100 - Philosophy & psychology
1
120 - Epistemology, causation & humankind
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
340 - Law
1
350 - Public administration & military science
1
410 - Linguistics
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
657 - Accounting
1
780 - Music
1